Chris,
Are you allowing me to formally apply for the name, "AndyMod"? Only if it works though...

Andreas

 

Simon,
Could you scan that page and post it here? My apologies if it's been posted already - I quickly scanned back through the replies and could not find it.

Andreas

 

is this what i think it is? end of VSC?

 

It sounds like it. I'm waiting for Ducky to hop back in here and scream to the heavens!


Someone needs to start a beer fund collection for Andreas. I've been feelin' for all you guys for a while now!

 

Wiring Diagram
Cheers

 

Thanks Simon! Page 1 does indeed show the connector in question (Master cylinder pressure sensor M4). Now the question is what each of the three wires (red 23, black 10 & white 22) do. Which one is the more likely candidate, that when cut, will turn off TRAC/VSC/ABS? Who knows, we may be able to actually turn off TRAC/VSC (as originally desired) but retain ABS.

I'm afraid that I'm not versed on how to interpret these diagrams, so hopefully someone will step forward and be able to decipher these three wires.

As for the beer fund, my vote goes to the other pioneers of this potential solution. I just brought the headache back to the surface hoping a solution had been found. 145 posts later, and we may actually be close! If we can get it to work, we can name it the AndyMod. That would work

Andreas

 

FWIW

I just looked at my 98 TRD, and it only has two (2) wires coming out of the master cylinder, green and white.

My guess from the diagram I would try disconnecting VCM (black wire).

 

AndyMod sounds good to me....

 

Awesome find Andreas!! Disabling A-Trac is something I've dreamed of since the day I first discovered my rig had A-Trac. VSC doesn't bother me so much as A-Trac, although it would be nice to pull out into traffic in semi-slick conditions without the throttle being taken away every time one of the rear tires over-rotates.

A-Trac on the other hand, is very troubling to me. Steep, snow covered inclines (especially those with sharp switchbacks) will almost always present some amount of tire spin. But as A-Trac engages, applying brake pressure to limit the slip, it adversely effects and disrupts forward momentum, hindering ones ability to continue the ascent (especially if tire spin continues on multiple wheels).

One question though... by disconnecting the "Oil Pressure Sensor Connector", did that also completely disable ABS (braking)?? ABS I like, VSC I can live with (occassionally), but A-Trac absolutely disgusts me.

Again, great work!

 

Scott,
Pulling the connector in the pic I posted did indeed turn off VSC, TRAC, and the ABS system. Normal braking was retained. Try as I might, I could not get the normal, non ABS, brakes to lock up.

If we can figure out what the three wires trigger or do, then we'll be on the home stretch and hopefully be able to cleanly integrate an on/off switch in the dash. I would like to retain ABS also, but frankly, if we figure out a way to click the systems on and off at will, without having to shut the truck off, I'm fine with that. I would leave everything intact 99% of the time anyway.

I think I'll take a Sharpie to that remaining dash blank and label it "TRAC OFF". Optimism is a good thing.

Andreas

 

Agreed. Being able to disable all three at will, is far better than not being able to disable it all!

 

heck yea. id gladly take that over having vsc any day.

 

having to deal with all this snow here in boston has taught me a lot as far as using this vsc/trac crap to get through sticky situations.

i found that if you seriously just pump the gas, you'll get through just fine. this turns trac off the second it turns on and lets you keep going. so just going "VRRR.. VRR ... VRRR.. VRRR.. VRRR" all the way through is much better than "VRRROOMM-tickticktickticktick"

 

I have tried this tell me if these sound right
-sensor still beeps when car skids out of control(in a closed street ).
-abs,Ebrake light, VSC, TRAC light stays on

After about 10minutes of disconnecting it I hear a constant "beep~~~~~~~" for about 5 seconds then it stopped. It didnt happen again though.

 

Ray,
Did you pull only the plug I singled out in my pic? I had no beeping sounds, nor did any of the VSC beeping sounds happen again. And I did a few 2WD and 4WD donuts to make damn sure! If you also pulled the plug on the front, that might explain your E-brake light. I believe that one is a fluid level sensor. Try it with just the one you see pulled in my pic.

The only indicators illuminated in my console were VSC OFF, VSC TRAC, and ABS. Plugged it back in and all was normal again.

Andreas

 

Mine did the exact same as Andreas, just the 3 lights are on and no more beeping. The only thing I didn't try was locking the center diff. Andreas, did you try that, and also, when you plugged the wire back in, did you leave your 4runner running or did you trun it off?

 

Cool info, Im glad you found a solution... I will prolley still be researching putting the switch in the factory place though, just because im anal, now that my garage is 90% clean... Ill take a gander at it soonish.

Sorry for the long absence, I was lost in the garage =)

 

I believe I pulled the wrong one haha, I'll try again. I really would like ducky's idea of having a factory switch for it

 

OMG!!!



and other vehicle...



Donations to "Get Ducky the Trac Switch Fund" gladly accepted...

Took the pic off a 2001 2wd limited 4runner... well someone else did not me... cuz if i were there Id ask someone to distact him while i took his dash apart so i could see how its wired... and then claim the switch as a souvineer....

Too bad i don't know him or I would ask if he could help with the wiring... =(

I CANT believe theres NO one on this board that has a 2wd that can help us...

 

I think LSUMatt has 2wd 01 4runner